A method and a device for luminance adjustment for a display panel are provided. The method includes: dividing a display zone into a plurality of compensation zones; acquiring a difference between an initial luminance value and a pre-determined reference luminance value in each of the plurality of compensation zones; obtaining an adjusted current by adjusting a current in an organic light-emitting diode (OLED) for a sub-pixel in a compensation zone corresponding thereto according to the difference for the compensation zone; and obtaining a target luminance value by compensating the initial luminance value for the compensation zone corresponding thereto according to the adjusted current.
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1. A luminance adjustment method for a display panel, comprising: dividing a display zone into a plurality of compensation zones, each of the plurality of compensation zones comprising at least one sub-pixel, wherein the display panel comprises the display zone; acquiring a difference between an initial luminance value and a pre-determined reference luminance value in each of the plurality of compensation zones; obtaining an adjusted current by adjusting a current in an organic light-emitting diode (OLED) for a sub-pixel in a compensation zone corresponding thereto according to the difference for the compensation zone; and obtaining a target luminance value by compensating the initial luminance value for the compensation zone corresponding thereto according to the adjusted current so that the luminance values for the compensation zones are the same; wherein the step of adjusting the current in the organic light-emitting diode (OLED) for the sub-pixel in the compensation zone corresponding thereto according to the difference for the compensation zone comprises: adjusting the current in the organic light-emitting diode (OLED) for the sub-pixel by adjusting at least one of the width-to-length ratio of the channel and the contact resistance in a driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the difference for the compensation zone, wherein the contact resistance is the load between the channel and at least one of the source and the drain of the driving thin-film transistor; increasing the current in the organic light-emitting diode (OLED) for the sub-pixel in the compensation zone corresponding thereto when the initial luminance value is smaller than the pre-determined reference luminance value; and reducing the current in the organic light-emitting diode (OLED) for the sub-pixel in the compensation zone corresponding thereto when the initial luminance value is larger than the pre-determined reference luminance value.
This invention relates to luminance adjustment in display panels, specifically for organic light-emitting diode (OLED) displays. The problem addressed is uneven luminance across a display due to variations in OLED performance, which can degrade visual quality. The solution involves dividing the display into multiple compensation zones, each containing at least one sub-pixel. For each zone, the method measures the difference between the initial luminance and a predetermined reference luminance. Based on this difference, the current driving the OLED in each sub-pixel is adjusted to compensate for luminance deviations. The adjustment is achieved by modifying either the width-to-length ratio of the channel or the contact resistance in the driving thin-film transistor (TFT) for the sub-pixel. If the initial luminance is below the reference, the current is increased; if it is above, the current is reduced. This ensures uniform luminance across all compensation zones. The method dynamically compensates for OLED degradation or manufacturing inconsistencies, improving display uniformity without requiring external sensors or complex calibration processes.
2. The luminance adjustment method for a display panel according to claim 1 , wherein the step of adjusting the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the difference for the compensation zone comprises: acquiring the load for the sub-pixel in the compensation zone; and adjusting the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the load.
This invention relates to luminance adjustment techniques for display panels, specifically addressing variations in brightness across different regions of the display due to manufacturing inconsistencies or environmental factors. The method focuses on compensating for luminance differences in designated compensation zones by dynamically adjusting the electrical characteristics of driving thin-film transistors (TFTs) associated with sub-pixels in those zones. The core technique involves modifying the width-to-length ratio of the channel in the driving TFT for each sub-pixel within a compensation zone. This adjustment is based on the load of the sub-pixel, which reflects its electrical demand or brightness requirement. By altering the channel ratio, the current drive capability of the TFT is fine-tuned, thereby correcting luminance discrepancies. The load for each sub-pixel is first acquired, then used to determine the optimal width-to-length ratio adjustment. This ensures uniform brightness across the display panel by compensating for variations in sub-pixel performance. The method leverages the relationship between TFT channel geometry and current flow to achieve precise luminance control. By dynamically adjusting the TFT characteristics in response to measured load conditions, the display panel maintains consistent brightness levels, improving visual quality and user experience. This approach is particularly useful in high-resolution or large-area displays where luminance uniformity is critical.
3. The luminance adjustment method for a display panel according to claim 2 , wherein the step of adjusting the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the load comprises: acquiring a load difference between the load and a pre-determined load; and adjusting the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the load difference.
This invention relates to luminance adjustment techniques for display panels, specifically addressing variations in brightness caused by load imbalances in driving thin-film transistors (TFTs) across different sub-pixels. The problem arises when uneven electrical loads in the TFTs lead to inconsistent luminance levels, degrading display quality. The solution involves dynamically adjusting the width-to-length ratio of the TFT channel for sub-pixels in a compensation zone to compensate for load differences. The method first measures the load difference between the actual load and a predetermined reference load for a given sub-pixel. Based on this difference, the width-to-length ratio of the TFT channel is adjusted to modify the current drive capability, thereby correcting luminance variations. This adjustment ensures uniform brightness across the display by compensating for load-induced deviations. The compensation zone may include multiple sub-pixels, and the adjustment is applied to the corresponding TFTs in that zone. The technique is particularly useful in high-resolution displays where load imbalances are more pronounced. By dynamically tuning the TFT channel geometry, the method maintains consistent luminance without requiring additional power or complex circuitry.
4. The luminance adjustment method for a display panel according to claim 1 , comprising: increasing the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone when the load in the compensation zone is larger than the pre-determined load; and reducing the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone when the load in the compensation zone is smaller than the pre-determined load.
This invention relates to luminance adjustment in display panels, specifically addressing variations in luminance uniformity caused by differences in electrical load across the panel. The problem arises when certain zones of the display experience higher or lower electrical loads, leading to inconsistent brightness levels. The solution involves dynamically adjusting the width-to-length ratio of the channel in the driving thin-film transistor (TFT) for sub-pixels within a compensation zone. When the load in a compensation zone exceeds a predetermined threshold, the channel width-to-length ratio is increased to compensate for the higher load, ensuring consistent luminance. Conversely, if the load is below the threshold, the ratio is reduced to maintain uniformity. This adjustment mechanism helps balance the electrical characteristics of the sub-pixels, mitigating brightness variations and improving overall display performance. The method ensures that the driving TFTs in the compensation zone are optimized based on real-time load conditions, enhancing visual quality and reliability.
5. The luminance adjustment method for a display panel according to claim 1 , wherein the step of adjusting the contact resistance in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the difference for the compensation zone comprises: adjusting at least one of the internal diameter and the depth of a contact hole and the electric conductivity of a filler in the contact hole in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the difference for the compensation zone, the contact hole being a connecting hole between the channel and at least one of the source and the drain of the driving thin-film transistor.
This technical summary describes a method for adjusting luminance uniformity in a display panel by modifying the contact resistance of driving thin-film transistors (TFTs) in specific sub-pixels. The method addresses luminance variations caused by manufacturing inconsistencies, such as differences in contact resistance across the panel. The solution involves selectively adjusting the contact resistance of TFTs in compensation zones to compensate for these variations. The adjustment is achieved by modifying at least one of the following parameters in the contact hole of the TFT: the internal diameter, the depth, or the electrical conductivity of the filler material. The contact hole serves as a conductive connection between the channel and either the source or drain of the TFT. By fine-tuning these parameters, the method ensures uniform luminance output across the display panel, improving visual quality. The approach is particularly useful in high-resolution displays where precise control of sub-pixel brightness is critical. The method leverages existing TFT structures but introduces targeted modifications to optimize performance without requiring significant redesign. This solution is applicable to various display technologies, including OLED and LCD panels, where luminance uniformity is a key performance metric.
6. The luminance adjustment method for a display panel according to claim 1 , comprising: increasing the contact resistance in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto when the initial luminance value in the compensation zone is larger than the pre-determined reference luminance value; and reducing the contact resistance in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto when the initial luminance value in the compensation zone is smaller than the pre-determined reference luminance value.
This invention relates to luminance adjustment techniques for display panels, specifically addressing luminance non-uniformity caused by variations in thin-film transistor (TFT) characteristics across the panel. The method dynamically adjusts the contact resistance of driving TFTs in sub-pixels to compensate for luminance deviations from a predetermined reference value. For sub-pixels in compensation zones where initial luminance exceeds the reference, the contact resistance of their driving TFTs is increased to reduce current flow and lower luminance. Conversely, for sub-pixels with initial luminance below the reference, the contact resistance is decreased to increase current flow and raise luminance. This approach ensures uniform luminance across the display by selectively modifying TFT contact resistance based on measured luminance values. The adjustment process involves analyzing luminance data from compensation zones and applying resistance changes to driving TFTs in corresponding sub-pixels. The method leverages the relationship between TFT contact resistance and luminance output to achieve precise compensation without altering other display components. This technique is particularly useful for improving display quality in large-area panels where manufacturing variations can cause noticeable luminance inconsistencies.
7. The luminance adjustment method for a display panel according to claim 1 , wherein the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel is proportional to the current in the organic light-emitting diode (OLED) for the sub-pixel.
This invention relates to luminance adjustment in display panels, specifically for organic light-emitting diode (OLED) displays. The problem addressed is achieving precise and uniform luminance control across sub-pixels in an OLED display, which is challenging due to variations in OLED current and thin-film transistor (TFT) characteristics. The method involves adjusting the luminance of a display panel by modifying the width-to-length ratio of the channel in the driving thin-film transistor (TFT) for each sub-pixel. The width-to-length ratio is set to be proportional to the current in the corresponding OLED. This ensures that the driving current through the OLED is accurately controlled, compensating for variations in OLED efficiency or TFT performance. The driving TFT regulates the current supplied to the OLED, and by adjusting its channel dimensions, the luminance output can be fine-tuned. This approach improves display uniformity and reduces power consumption by optimizing current flow for each sub-pixel. The method is particularly useful in high-resolution OLED displays where precise luminance control is critical for image quality.
8. A luminance adjustment method for a display panel, comprising: dividing a display zone into a plurality of compensation zones, each of the plurality of compensation zones comprising at least one sub-pixel, wherein the display panel comprises the display zone; acquiring a difference between an initial luminance value and a pre-determined reference luminance value in each of the plurality of compensation zones; obtaining an adjusted current by adjusting a current in an organic light-emitting diode (OLED) for a sub-pixel in a compensation zone corresponding thereto according to the difference for the compensation zone; and obtaining a target luminance value by compensating the initial luminance value for the compensation zone corresponding thereto according to the adjusted current so that the luminance values for the compensation zones are the same; wherein the step of adjusting the current in the organic light-emitting diode (OLED) for the sub-pixel in the compensation zone corresponding thereto according to the difference for the compensation zone comprises: adjusting the current in the organic light-emitting diode (OLED) for the sub-pixel by adjusting at least one of the width-to-length ratio of the channel and the contact resistance in a driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the difference for the compensation zone, wherein the contact resistance is the load between the channel and at least one of the source and the drain of the driving thin-film transistor.
This invention relates to luminance adjustment techniques for display panels, specifically addressing variations in luminance across different regions of an organic light-emitting diode (OLED) display. The problem being solved is the non-uniform luminance that occurs due to manufacturing inconsistencies or degradation over time, which can lead to visible brightness differences between zones of the display. The method involves dividing the display area into multiple compensation zones, each containing at least one sub-pixel. For each zone, the difference between the initial luminance and a predetermined reference luminance is calculated. Based on this difference, the current in the OLED for each sub-pixel is adjusted to compensate for luminance deviations. This adjustment is achieved by modifying either the width-to-length ratio of the channel or the contact resistance in the driving thin-film transistor (TFT) for the sub-pixel. The contact resistance refers to the load between the channel and either the source or drain of the TFT. By fine-tuning these parameters, the current driving the OLED is adjusted, resulting in a uniform target luminance across all compensation zones. This approach ensures consistent brightness across the entire display panel, improving visual quality and longevity.
9. The luminance adjustment method for a display panel according to claim 8 , wherein the step of adjusting the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the difference for the compensation zone comprises: acquiring the load for the sub-pixel in the compensation zone; and adjusting the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the load.
This invention relates to luminance adjustment in display panels, specifically addressing variations in brightness across different regions of the panel. The problem arises from non-uniform luminance caused by differences in electrical load among sub-pixels, particularly in large-area displays where peripheral sub-pixels may exhibit lower brightness than central ones due to variations in driving transistor characteristics. The method involves adjusting the width-to-length ratio of the channel in the driving thin-film transistor (TFT) for each sub-pixel in a compensation zone. The adjustment is based on the electrical load of the sub-pixel, which is first acquired. By modifying the channel's width-to-length ratio, the driving current through the TFT is adjusted to compensate for luminance discrepancies. This ensures uniform brightness across the display by tailoring the transistor's electrical properties to the specific load conditions of each sub-pixel. The compensation zone refers to a designated area of the display panel where luminance adjustment is applied. The load for each sub-pixel in this zone is determined, and the channel's width-to-length ratio is then adjusted accordingly. This fine-tuning compensates for variations in driving current, ensuring consistent luminance output. The method is particularly useful in high-resolution or large-format displays where maintaining uniform brightness is critical for visual quality.
10. The luminance adjustment method for a display panel according to claim 9 , wherein the step of adjusting the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the load comprises: acquiring a load difference between the load and a pre-determined load; and adjusting the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the load difference.
This invention relates to luminance adjustment in display panels, specifically addressing variations in brightness caused by load differences in driving thin-film transistors (TFTs) for sub-pixels. The problem arises when the electrical load on TFTs varies across a display, leading to uneven luminance. To compensate, the method adjusts the width-to-length ratio of the TFT channel for sub-pixels in a compensation zone. The adjustment is based on a calculated load difference between the actual load and a predetermined reference load. By modifying the channel ratio, the method ensures consistent luminance across the display, mitigating brightness irregularities. The compensation zone refers to an area of the display where sub-pixel luminance needs adjustment due to load variations. The method dynamically adjusts the TFT channel geometry to balance the electrical load, thereby maintaining uniform brightness. This approach is particularly useful in high-resolution or large-area displays where load variations are more pronounced. The technique improves display uniformity without requiring additional hardware, relying instead on precise control of TFT channel dimensions.
11. The luminance adjustment method for a display panel according to claim 9 , comprising: increasing the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone when the load in the compensation zone is larger than the pre-determined load; and reducing the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone when the load in the compensation zone is smaller than the pre-determined load.
This invention relates to luminance adjustment in display panels, specifically addressing variations in luminance uniformity caused by differences in electrical load across the panel. The problem arises when certain zones of the display experience higher or lower electrical loads, leading to inconsistent brightness levels. The solution involves dynamically adjusting the width-to-length ratio of the channel in the driving thin-film transistor (TFT) for sub-pixels within a compensation zone. When the load in the compensation zone exceeds a predetermined threshold, the width-to-length ratio of the TFT channel is increased to compensate for the higher load, ensuring consistent luminance. Conversely, if the load is below the threshold, the width-to-length ratio is reduced to maintain uniformity. The adjustment process is based on real-time load measurements, allowing the display to self-correct for variations in electrical load and improve overall brightness consistency. This method enhances display performance by mitigating luminance discrepancies without requiring additional hardware, relying instead on precise control of the TFT channel geometry.
12. The luminance adjustment method for a display panel according to claim 8 , wherein the step of adjusting the contact resistance in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the difference for the compensation zone comprises: adjusting at least one of the internal diameter and the depth of a contact hole and the electric conductivity of a filler in the contact hole in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the difference for the compensation zone, the contact hole being a connecting hole between the channel and at least one of the source and the drain of the driving thin-film transistor.
This invention relates to luminance adjustment in display panels, specifically addressing non-uniform brightness caused by variations in thin-film transistor (TFT) characteristics across the panel. The method targets compensation zones where sub-pixels exhibit luminance differences due to inconsistent contact resistance in the driving TFTs. To correct these differences, the method adjusts the contact resistance in the driving TFTs of affected sub-pixels by modifying at least one of three parameters: the internal diameter or depth of the contact hole (which connects the TFT channel to the source/drain electrodes) or the electrical conductivity of the filler material within the contact hole. By precisely tuning these parameters, the method compensates for luminance discrepancies, ensuring uniform brightness across the display. The approach leverages structural modifications to the TFT's contact hole to fine-tune electrical performance, addressing a common manufacturing challenge in display production where process variations lead to inconsistent TFT behavior. This solution avoids complex circuit-level adjustments, instead relying on physical adjustments to the TFT's contact interface to achieve consistent luminance.
13. The luminance adjustment method for a display panel according to claim 8 , comprising: increasing the contact resistance in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto when the initial luminance value in the compensation zone is larger than the pre-determined reference luminance value; and reducing the contact resistance in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto when the initial luminance value in the compensation zone is smaller than the pre-determined reference luminance value.
This invention relates to luminance adjustment techniques for display panels, specifically addressing non-uniform luminance issues caused by variations in thin-film transistor (TFT) characteristics across the panel. The method dynamically adjusts the contact resistance of driving TFTs in sub-pixels to compensate for luminance deviations from a predetermined reference value. When a sub-pixel's initial luminance exceeds the reference, the contact resistance of its driving TFT is increased to reduce current flow and lower luminance. Conversely, if the initial luminance is below the reference, the contact resistance is decreased to increase current flow and raise luminance. The compensation zones are predefined areas of the display panel where luminance measurements are taken. The method ensures uniform brightness across the panel by selectively modifying TFT contact resistance based on localized luminance discrepancies. This approach leverages the adjustable resistance properties of TFTs to fine-tune sub-pixel brightness without altering other display components, providing a cost-effective solution for maintaining consistent display quality. The technique is particularly useful in high-resolution displays where luminance uniformity is critical.
14. The luminance adjustment method for a display panel according to claim 8 , comprising: increasing the current in the organic light-emitting diode (OLED) for the sub-pixel in the compensation zone corresponding thereto when the initial luminance value is smaller than the pre-determined reference luminance value; and reducing the current in the organic light-emitting diode (OLED) for the sub-pixel in the compensation zone corresponding thereto when the initial luminance value is larger than the pre-determined reference luminance value.
This invention relates to luminance adjustment techniques for display panels, specifically addressing inconsistencies in brightness across organic light-emitting diode (OLED) sub-pixels. The method targets compensation zones within the display panel where luminance values deviate from a predetermined reference value. When a sub-pixel's initial luminance is below the reference, the method increases the current supplied to its OLED to enhance brightness. Conversely, if the initial luminance exceeds the reference, the current is reduced to lower the brightness. This dynamic adjustment ensures uniform luminance distribution across the display, mitigating issues like uneven brightness or color shifts caused by manufacturing variations or degradation over time. The approach leverages localized current modulation to fine-tune each sub-pixel's output, improving visual quality without requiring extensive hardware modifications. The method is particularly useful for high-resolution OLED displays where precise luminance control is critical for maintaining image fidelity. By dynamically adjusting current based on real-time or pre-calibrated luminance data, the technique enhances display performance while maintaining energy efficiency.
15. A luminance adjustment device for a display panel, comprising: a zone dividing module configured to divide a display zone into a plurality of compensation zones, each of the plurality of compensation zones comprising at least one sub-pixel, wherein the display panel comprises the display zone; a difference acquisition module configured to acquire a difference between an initial luminance value and a pre-determined reference luminance value in each of the plurality of compensation zones; an adjustment module configured to obtain an adjusted current by adjusting a current in an organic light-emitting diode (OLED) for a sub-pixel in a compensation zone corresponding thereto according to the difference for the compensation zone, wherein the adjustment module is configured to adjust the current in the organic light-emitting diode (OLED) for the sub-pixel by adjusting at least one of the width-to-length ratio of the channel and the contact resistance in a driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the difference for the compensation zone, wherein the contact resistance is the load between the channel and at least one of the source and the drain of the driving thin-film transistor; and a compensation module configured to obtain a target luminance value by compensating the initial luminance value for the compensation zone corresponding thereto according to the adjusted current so that the luminance values for the compensation zones are the same.
This invention relates to luminance adjustment in display panels, particularly for organic light-emitting diode (OLED) displays. The problem addressed is uneven luminance across different zones of the display, which can degrade visual quality. The solution involves dynamically adjusting the luminance of individual sub-pixels within compensation zones to achieve uniform brightness. The device divides the display area into multiple compensation zones, each containing at least one sub-pixel. For each zone, the difference between the initial luminance and a predetermined reference luminance is calculated. Based on this difference, the current driving the OLED for each sub-pixel is adjusted by modifying either the width-to-length ratio of the channel or the contact resistance in the driving thin-film transistor (TFT). The contact resistance refers to the load between the channel and the source/drain of the TFT. After adjusting the current, the initial luminance is compensated to match the target luminance, ensuring uniformity across all zones. This approach allows for precise control over sub-pixel brightness, improving display consistency without requiring external calibration.
16. The luminance adjustment device according to claim 15 , wherein the adjustment module comprises: an acquisition unit configured to acquire the load for the sub-pixel in the compensation zone; and an adjustment unit configured to adjust the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the load.
This invention relates to luminance adjustment in display devices, specifically addressing variations in brightness caused by differences in electrical load across sub-pixels. In display panels, sub-pixels in different regions may experience varying electrical loads due to factors like wiring resistance or panel size, leading to uneven luminance. The invention provides a luminance adjustment device that compensates for these variations by dynamically adjusting the width-to-length ratio of the channel in the driving thin-film transistor (TFT) for each sub-pixel in a compensation zone. The device includes an adjustment module with two key components: an acquisition unit and an adjustment unit. The acquisition unit measures the electrical load for each sub-pixel in the compensation zone. The adjustment unit then modifies the width-to-length ratio of the channel in the driving TFT for that sub-pixel based on the measured load. By altering this ratio, the device adjusts the current flow through the TFT, compensating for load-induced brightness discrepancies. This ensures uniform luminance across the display panel, improving visual quality. The solution is particularly useful in large-area or high-resolution displays where load variations are more pronounced.
17. The luminance adjustment device according to claim 16 , wherein the adjustment unit is configured to acquire a load difference between the load and a pre-determined load and adjust the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone corresponding thereto according to the load difference.
This invention relates to luminance adjustment in display devices, specifically addressing variations in brightness caused by load differences in driving thin-film transistors (TFTs) for sub-pixels. The problem arises when different sub-pixels experience varying electrical loads, leading to inconsistent luminance across the display. The solution involves dynamically adjusting the width-to-length ratio of the channel in the driving TFT for each sub-pixel to compensate for these load differences. The device includes a luminance adjustment unit that measures the load difference between the actual load of a sub-pixel and a predetermined reference load. Based on this difference, the unit modifies the channel width-to-length ratio of the corresponding driving TFT. This adjustment ensures that the driving current remains consistent across sub-pixels, maintaining uniform brightness. The compensation is applied to sub-pixels in a designated compensation zone, where load variations are most significant. By dynamically adjusting the TFT channel geometry, the device corrects luminance discrepancies without requiring additional power or complex circuitry, improving display uniformity and image quality. The solution is particularly useful in high-resolution displays where load imbalances are more pronounced.
18. The luminance adjustment device according to claim 16 , wherein: the adjustment unit increases the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone when the load in the compensation zone is larger than the pre-determined load; and the adjustment unit reduces the width-to-length ratio of the channel in the driving thin-film transistor for the sub-pixel in the compensation zone when the load in the compensation zone is smaller than the pre-determined load.
This invention relates to a luminance adjustment device for display panels, specifically addressing variations in luminance uniformity caused by differences in electrical load across the display. The device includes a driving thin-film transistor (TFT) for each sub-pixel, where the channel width-to-length ratio of the TFT is adjustable to compensate for load imbalances. The adjustment unit dynamically modifies this ratio based on the load in a specific compensation zone of the display. If the load in the compensation zone exceeds a predetermined threshold, the width-to-length ratio of the TFT channel is increased to enhance current flow and maintain luminance. Conversely, if the load is below the threshold, the ratio is reduced to prevent excessive current and ensure uniformity. This adaptive adjustment compensates for variations in resistance and capacitance across the display, improving overall brightness consistency without requiring additional power or complex circuitry. The solution is particularly useful in large-area displays where load imbalances are more pronounced.
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January 14, 2019
April 12, 2022
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